List all available AI agents with their metadata
AI agents call list_agents to retrieve information from Pantheon without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool queries and returns a list of available agents and their metadata. This is a read-only operation that retrieves information without creating, modifying, deleting, or executing anything. The blast radius if misused by an AI agent is minimal—it only exposes metadata about available agents, which is informational in nature.
From the tool's definition Tool name is 'list_agents' and description states 'List all available AI agents with their metadata' — this is a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_agents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pantheon, and nothing reaches the server without passing your rules. This is the rule we recommend for list_agents:
{
"version": "1",
"default": "deny",
"tools": {
"list_agents": {}
}
}list_agents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all available AI agents with their metadata. It is categorised as a Read tool in the Pantheon MCP Server, which means it retrieves data without modifying state.
Register the Pantheon MCP server in PolicyLayer and add a rule for list_agents: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Pantheon. Nothing to install.
list_agents is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_agents rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list_agents. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list_agents is provided by the Pantheon MCP server (valado/pantheon-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Pantheon, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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3 Pantheon tools catalogued and risk-classified — across an index of 43,000+ MCP servers.